@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #0b0f0d;
  --surface: #131b17;
  --surface-card: #18231e;
  --surface-hover: #212f29;
  --text-primary: #f5f9f6;
  --text-secondary: #b0c2b7;
  --text-muted: #74877c;
  --lime: #d9f36a;
  --lime-hover: #e8ff7a;
  --lime-glow: rgba(217, 243, 106, 0.45);
  --lime-glow-soft: rgba(217, 243, 106, 0.18);
  --cyan: #5ef3d2;
  --cyan-glow: rgba(94, 243, 210, 0.4);
  --gold: #ffd15c;
  --gold-glow: rgba(255, 209, 92, 0.5);
  --red: #ff5252;
  --red-glow: rgba(255, 82, 82, 0.45);
  --border: #23312a;
  --border-light: #2e4138;
}

* {
  box-sizing: border-box;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: 'Space Grotesk', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse at 50% 10%, rgba(217, 243, 106, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 85%, rgba(94, 243, 210, 0.04) 0%, transparent 50%);
}

.game-wrapper {
  max-width: 960px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0 16px 24px;
}

/* Header */
.game-header {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.nav-back {
  font: 600 .85rem 'DM Mono', monospace;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all .15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: .05em;
}

.nav-back:hover {
  color: var(--lime);
  transform: translateX(-3px);
}

.control-btn {
  background: var(--surface);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 4px;
  display: grid;
  place-items: center;
  font-size: 1rem;
  cursor: pointer;
  transition: all .15s ease;
}

.control-btn:hover {
  border-color: var(--lime);
  background: var(--surface-hover);
  box-shadow: 0 0 10px var(--lime-glow-soft);
}

/* HUD Bar */
.hud-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 14px 20px;
  border-radius: 6px;
  margin-bottom: 18px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.hud-group {
  display: flex;
  flex-direction: column;
}

.hud-label {
  font: 700 .68rem 'DM Mono', monospace;
  letter-spacing: .2em;
  color: var(--lime);
}

.hud-title {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--text-primary);
}

.hud-stats {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  padding: 8px 14px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  min-width: 80px;
}

.stat-label {
  font: 600 .62rem 'DM Mono', monospace;
  letter-spacing: .15em;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 800;
  font-family: 'DM Mono', monospace;
  color: var(--text-primary);
  line-height: 1.1;
  margin-top: 2px;
}

.stat-value.highlight {
  color: var(--lime);
  text-shadow: 0 0 10px var(--lime-glow-soft);
}

.shields-row {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.shield-pip {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.08);
  transition: all .25s ease;
}

.shield-pip.active {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 8px var(--lime-glow);
}

.shield-pip.lost {
  background: rgba(255, 82, 82, 0.2);
  border-color: var(--red);
  box-shadow: 0 0 6px var(--red-glow);
}

/* Canvas Area */
.canvas-container {
  position: relative;
  width: 100%;
  height: clamp(440px, 60vh, 580px);
  background: #080c0a;
  border: 2px solid var(--lime);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 
    0 0 20px rgba(217, 243, 106, 0.35),
    0 0 50px rgba(217, 243, 106, 0.15),
    inset 0 0 30px rgba(217, 243, 106, 0.08);
  cursor: pointer;
  touch-action: none;
}

#game-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Tap Hint */
.tap-hint {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  font: 600 .7rem 'DM Mono', monospace;
  letter-spacing: .2em;
  color: var(--text-muted);
  pointer-events: none;
  background: rgba(11, 15, 13, 0.6);
  padding: 6px 14px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  animation: pulseHint 2.4s infinite ease-in-out;
}

@keyframes pulseHint {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 0.95; color: var(--lime); border-color: var(--lime-glow-soft); }
}

/* Overlays */
.game-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 10, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  padding: 16px 12px;
  z-index: 20;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: opacity .25s ease, visibility .25s ease;
}

.game-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.overlay-modal {
  margin: auto;
  background: var(--surface);
  border: 2px solid var(--lime);
  box-shadow: 0 0 35px var(--lime-glow), 0 20px 50px rgba(0, 0, 0, 0.7);
  padding: 30px 24px;
  border-radius: 6px;
  max-width: 460px;
  width: 100%;
  text-align: center;
  animation: modalEnter .3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.overlay-kicker {
  font: 700 .72rem 'DM Mono', monospace;
  letter-spacing: .22em;
  color: var(--lime);
  margin: 0 0 10px;
}

.overlay-kicker.text-red {
  color: var(--red);
}

.overlay-title {
  margin: 0 0 14px;
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1;
  color: var(--text-primary);
}

.overlay-desc {
  color: var(--text-secondary);
  font-size: .95rem;
  line-height: 1.5;
  margin: 0 0 22px;
}

.rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
  text-align: left;
}

.rule-box {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  padding: 12px;
  border-radius: 4px;
}

.rule-box.perfect-rule {
  border-color: rgba(255, 209, 92, 0.5);
  box-shadow: inset 0 0 15px rgba(255, 209, 92, 0.08);
}

.rule-box.good-rule {
  border-color: rgba(217, 243, 106, 0.4);
}

.rule-score {
  display: inline-block;
  font: 800 .75rem 'DM Mono', monospace;
  padding: 2px 6px;
  border-radius: 2px;
  margin-bottom: 6px;
}

.perfect-rule .rule-score {
  background: var(--gold);
  color: #0b0f0d;
}

.good-rule .rule-score {
  background: var(--lime);
  color: #0b0f0d;
}

.rule-box strong {
  display: block;
  font-size: .88rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.rule-box p {
  margin: 0;
  font-size: .76rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.speed-warning {
  font: 600 .76rem 'DM Mono', monospace;
  color: var(--lime);
  letter-spacing: .08em;
  margin: 0 0 24px;
}

.action-btn {
  width: 100%;
  padding: 16px 24px;
  background: var(--lime);
  color: #0b0f0d;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .04em;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: all .2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px var(--lime-glow);
}

.action-btn:hover {
  background: var(--lime-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--lime-glow);
}

.action-btn:active {
  transform: translateY(1px);
}

.btn-arrow {
  font-size: 1.25rem;
  transition: transform .15s ease;
}

.action-btn:hover .btn-arrow {
  transform: translateX(4px);
}

.hint-key {
  margin: 14px 0 0;
  font-size: .78rem;
  color: var(--text-muted);
}

.hint-key strong {
  color: var(--text-secondary);
}

/* Game Over Stats Summary */
.stats-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0 24px;
}

.summary-box {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  padding: 14px 10px;
  border-radius: 4px;
}

.summary-box span {
  font: 600 .65rem 'DM Mono', monospace;
  letter-spacing: .15em;
  color: var(--text-muted);
  display: block;
}

.summary-box strong {
  font: 800 1.7rem 'DM Mono', monospace;
  color: var(--text-primary);
  display: block;
  margin-top: 4px;
}

.text-lime {
  color: var(--lime) !important;
}

/* Shake Animation */
.shake-screen {
  animation: screenShake .25s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes screenShake {
  10%, 90% { transform: translate3d(-3px, 0, 0); }
  20%, 80% { transform: translate3d(4px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-5px, 0, 0); }
  40%, 60% { transform: translate3d(5px, 0, 0); }
}

/* Perfect Shock Flash */
.flash-gold {
  box-shadow: 
    0 0 45px var(--gold-glow),
    0 0 100px var(--gold-glow),
    inset 0 0 40px rgba(255, 209, 92, 0.4) !important;
  border-color: var(--gold) !important;
  transition: all .08s ease;
}

.flash-red {
  box-shadow: 
    0 0 35px var(--red-glow),
    0 0 80px var(--red-glow),
    inset 0 0 40px rgba(255, 82, 82, 0.35) !important;
  border-color: var(--red) !important;
  transition: all .08s ease;
}

/* Responsive */
@media (max-width: 680px) {
  .game-wrapper {
    padding: 0 10px 16px;
  }

  .canvas-container {
    height: clamp(350px, calc(100dvh - 160px), 520px);
  }

  .hud-stats {
    width: 100%;
    justify-content: space-between;
  }

  .stat-card {
    min-width: 60px;
    padding: 6px 8px;
  }
}

@media (max-width: 480px) {
  .game-wrapper {
    padding: 0 8px 12px;
    min-height: 100dvh;
  }

  .game-header {
    height: 46px;
    margin-bottom: 8px;
  }

  .hud-bar {
    padding: 8px 10px;
    margin-bottom: 8px;
    gap: 6px;
  }

  .hud-group {
    flex-direction: row;
    align-items: baseline;
    gap: 6px;
  }

  .hud-label {
    font-size: 0.6rem;
  }

  .hud-title {
    font-size: clamp(0.95rem, 3.8vw, 1.15rem);
    letter-spacing: -0.02em;
  }

  .hud-stats {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
  }

  .stat-card {
    min-width: 0;
    padding: 4px 4px;
    align-items: center;
    text-align: center;
  }

  .stat-label {
    font-size: 0.5rem;
    letter-spacing: 0.08em;
  }

  .stat-value {
    font-size: 1.05rem;
    margin-top: 1px;
  }

  .shields-row {
    gap: 3px;
    margin-top: 3px;
  }

  .shield-pip {
    width: 9px;
    height: 9px;
  }

  .canvas-container {
    height: clamp(340px, calc(100dvh - 140px), 500px);
  }

  .game-overlay {
    padding: 8px 6px;
  }

  .overlay-modal {
    padding: 18px 14px;
    width: 96%;
    max-width: 360px;
  }

  .overlay-kicker {
    font-size: 0.64rem;
    margin-bottom: 4px;
  }

  .overlay-title {
    font-size: 1.35rem;
    margin-bottom: 6px;
  }

  .overlay-desc {
    font-size: 0.8rem;
    margin-bottom: 10px;
    line-height: 1.35;
  }

  .rules-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-bottom: 10px;
  }

  .rule-box {
    padding: 6px 8px;
  }

  .rule-score {
    font-size: 0.72rem;
  }

  .rule-box strong {
    font-size: 0.78rem;
  }

  .rule-box p {
    font-size: 0.7rem;
    margin-top: 3px;
    line-height: 1.25;
  }

  .speed-warning {
    font-size: 0.72rem;
    margin-bottom: 10px;
  }

  .action-btn {
    padding: 11px 18px;
    font-size: 0.9rem;
    width: 100%;
    justify-content: center;
  }

  .hint-key {
    display: none;
  }

  .stats-summary {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-bottom: 12px;
  }

  .summary-box {
    padding: 6px 8px;
  }

  .summary-box span {
    font-size: 0.58rem;
  }

  .summary-box strong {
    font-size: 1.15rem;
  }
}